Hi there. Hopefully someone can help me. I am getting the same error message below every few minutes. ZD 7.01, win7 ultimate on a samsung N130 netbook, 2 email accounts gmail and a pop, calendar and address book linked to my google account. Thanks in advance.

network service error has occurred.
method: [unknown]
msg: system failure: java.lang.ClassCastException: com.zimbra.cs.mailbox.DataSourceMailbox cannot be cast to com.zimbra.cs.mailbox.ZcsMailbox
code: service.FAILURE
detail: soap:Receiver
trace: com.zimbra.common.service.ServiceException: system failure: java.lang.ClassCastException: com.zimbra.cs.mailbox.DataSourceMailbox cannot be cast to com.zimbra.cs.mailbox.ZcsMailbox ExceptionId:btpool0-18:1307538040196:d7e690e4d2ef4f0f Code:service.FAILURE at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:248) at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEng ine.java:438) at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:287) at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:158) at com.zimbra.soap.SoapServlet.doWork(SoapServlet.jav a:294) at com.zimbra.soap.SoapServlet.doPost(SoapServlet.jav a:215) at javax.servlet.http.HttpServlet.service(HttpServlet .java:725) at com.zimbra.cs.servlet.ZimbraServlet.service(Zimbra Servlet.java:208) at javax.servlet.http.HttpServlet.service(HttpServlet .java:814) at org.mortbay.jetty.servlet.ServletHolder.handle(Ser vletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler.handle(Se rvletHandler.java:390) at org.mortbay.jetty.security.SecurityHandler.handle( SecurityHandler.java:218) at org.mortbay.jetty.servlet.SessionHandler.handle(Se ssionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(Co ntextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebA ppContext.java:422) at org.mortbay.jetty.handler.ContextHandlerCollection .handle(ContextHandlerCollection.java:230) at org.mortbay.jetty.handler.HandlerCollection.handle (HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152) at org.mortbay.jetty.handler.rewrite.RewriteHandler.h andle(RewriteHandler.java:230) at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(Htt pConnection.java:543) at org.mortbay.jetty.HttpConnection$RequestHandler.co ntent(HttpConnection.java:946) at org.mortbay.jetty.HttpParser.parseNext(HttpParser. java:756) at org.mortbay.jetty.HttpParser.parseAvailable(HttpPa rser.java:218) at org.mortbay.jetty.HttpConnection.handle(HttpConnec tion.java:405) at org.mortbay.io.nio.SelectChannelEndPoint.run(Selec tChannelEndPoint.java:410) at org.mortbay.thread.BoundedThreadPool$PoolThread.ru n(BoundedThreadPool.java:451) Caused by: java.lang.ClassCastException: com.zimbra.cs.mailbox.DataSourceMailbox cannot be cast to com.zimbra.cs.mailbox.ZcsMailbox at com.zimbra.cs.service.offline.OfflineSendDeliveryR eport.sendReport(OfflineSendDeliveryReport.java:12 8) at com.zimbra.cs.service.offline.OfflineSendDeliveryR eport.handle(OfflineSendDeliveryReport.java:74) at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEng ine.java:412) ... 26 more
request: